Yamaha YEP-321 Owners Manual - Page 11

Before You Play ■ Tuning the Instrument Slide the main tuning slide in or out to tune the instrument. Since temperatures have an effect on the instrument's pitch, blow some warm air through the instrument to warm up the instrument before tuning. Main tuning slide ■ About the 5th Valve Extension (YFB-621/YCB-822 Only) The YFB-621 and YCB-822 are both supplied with an extension for the 5th valve that can be installed between the 5th valve slide and the instrument's main 5th valve tubing. The 5th valve lowers the instrument's pitch. The 5th valve's pitch changes as described below when the extension is removed. Normally, the 5th valve is used in combination with the 4th valve, etc., to correct pitch in the instrument's lower range, however the pitch may be slightly higher or lower depending upon the mouthpiece being used. • With the 5th Valve Extension installed (as shipped from the factory) YFB-621: 4/3 steps lower YCB-822: 2 steps lower 5th valve extension Instrument (5th valve slide) 5th valve slide • Without the 5th Valve Extension YFB-621: 2/3 steps lower YCB-822 4/3 steps lower 5th valve slide Instrument (5th valve slide) 27